转 Java中User Thread和Daemon Thread的区别

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import static java.util.concurrent.TimeUnit.*;

public class DaemonTest {

    public static void main(String[] args) throws InterruptedException {

        Runnable r = new Runnable() {

            public void run() {

                for (int time = 10; time > 0; --time) {

                    System.out.println("Time #" + time);

                    try {

                        SECONDS.sleep(2);

                    } catch (InterruptedException e) {

                        e.printStackTrace();

                    }

                }

            }

        };

        Thread t = new Thread(r);

        t.setDaemon(true);  // try to set this to "false" and see what happens

        t.start();

        System.out.println("Main thread waiting...");

        SECONDS.sleep(6);

        System.out.println("Main thread exited.");

    }

}